普鲁士蓝及其类似化合物(Prussian blue analogous,PBAs)因其固有的热力学稳定性、宽广的离子插层/脱嵌通道、丰富的电化学活性位点以及可调节的化学组成与元素比例,已经成为下一代钠离子电池正极材料的有力候选者。然而,这类材料的电...普鲁士蓝及其类似化合物(Prussian blue analogous,PBAs)因其固有的热力学稳定性、宽广的离子插层/脱嵌通道、丰富的电化学活性位点以及可调节的化学组成与元素比例,已经成为下一代钠离子电池正极材料的有力候选者。然而,这类材料的电化学性能常常受到晶体缺陷和高含量结晶水及间隙水的影响。本文论述了PBAs的结构,并从单电子和双电子的角度概括了其分类,探讨了当前这类材料面临的挑战,并从结晶度控制、缺陷控制、形貌调控、离子掺杂/取代、组分优化以及碳包覆/复合六个方面系统地综述了现有的典型改性策略,评述了这类材料从实验室研究向产业化应用过渡的现状。此外,本文还展望了PBAs在钠离子电池领域的发展前景,通过材料工程和表面科学的进步,PBAs有望从实验室阶段迈向工业化应用。展开更多
Highly oriented cubic, hollow cubic and spherical nanoparticles of cobalt-iron Prussian blue analogues were synthesized in poly oxyethylene tertoctylphenyl ether (TritonX-100)/n-hexanol/cyclohexane microemulsion. The ...Highly oriented cubic, hollow cubic and spherical nanoparticles of cobalt-iron Prussian blue analogues were synthesized in poly oxyethylene tertoctylphenyl ether (TritonX-100)/n-hexanol/cyclohexane microemulsion. The effects of the water-to-surfactant molar ratio (w), the reactant concentration and the reaction temperature on the morphology of cobalt-iron Prussian blue analogues were studied. The samples were characterized by transmission electron microscopy (TEM), field emission scan electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and infrared spectroscopy (IR).展开更多
文摘普鲁士蓝及其类似化合物(Prussian blue analogous,PBAs)因其固有的热力学稳定性、宽广的离子插层/脱嵌通道、丰富的电化学活性位点以及可调节的化学组成与元素比例,已经成为下一代钠离子电池正极材料的有力候选者。然而,这类材料的电化学性能常常受到晶体缺陷和高含量结晶水及间隙水的影响。本文论述了PBAs的结构,并从单电子和双电子的角度概括了其分类,探讨了当前这类材料面临的挑战,并从结晶度控制、缺陷控制、形貌调控、离子掺杂/取代、组分优化以及碳包覆/复合六个方面系统地综述了现有的典型改性策略,评述了这类材料从实验室研究向产业化应用过渡的现状。此外,本文还展望了PBAs在钠离子电池领域的发展前景,通过材料工程和表面科学的进步,PBAs有望从实验室阶段迈向工业化应用。
文摘Highly oriented cubic, hollow cubic and spherical nanoparticles of cobalt-iron Prussian blue analogues were synthesized in poly oxyethylene tertoctylphenyl ether (TritonX-100)/n-hexanol/cyclohexane microemulsion. The effects of the water-to-surfactant molar ratio (w), the reactant concentration and the reaction temperature on the morphology of cobalt-iron Prussian blue analogues were studied. The samples were characterized by transmission electron microscopy (TEM), field emission scan electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and infrared spectroscopy (IR).
